安装mplayer
yum -y install https://download1.rpmfusion.org/free/el/rpmfusion-free-release-7.noarch.rpm
yum -y install https://download1.rpmfusion.org/nonfree/el/rpmfusion-nonfree-release-7.noarch.rpm
yum repolist enabled
yum search mplayer
yum -y install mplayer.x86_64
yum -y install mencoder.x86_64
history

shell下捕获摄像头影像

mencoder tv:// -tv driver=v4l2:device=/dev/video0:alsa:adevice=hw.0,0:forceaudio:width=640:height=480 -ovc lavc -oac mp3lame -o test.avi​
mplayer tv:// -tv driver=v4l2:device=/dev/video0:input=0:outfmt=bgr24:width=640:height=480:fps=25 -vo png -frames 10
ls -lht